T-Branch Communication Specifications List - Mitsubishi MELSEC-Q Series User Manual

7 PROCEDURE BEFORE STARTING THE DATA LINK

7.6.2 T-Branch communication specifications list

Item
Transmission rate
Maximum length of the main line
Maximum length of the branch line
Overall branch line length
Maximum number of connected
stations on the branch line
Connection cable
Terminal resistor
(connection method)
Only when
A(1S)J61BT11/A(1S)J61QBT11
is used as the master station.
When the QJ61BT11 is used as
the master station, connect the
110 Ω resistor that is supplied
with the module. For the
connection method, see Section
7.5.
T branch terminal block/connector
Maximum length of main line, distance
between T branches, and length of
cable between stations
Terminal
resistor
R
2
1
1
(Length of branch line: 8m (26.25 ft.) or shorter)
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The following describes the communication specifications for T branch connection.
For communication specifications not listed below, see Section 3.1.
Specification
625 kbps
100 m
(328.1 ft.)
8 m (26.25 ft.)
50 m (164.05 ft.)
6 stations per branch
CC-Link dedicated cable
(Example: FANC-SB, CSFV-SLAB,
100ZCLK-SB-20AWGX3C)
110 Ω ± 5 %, 1/2W × 4
(Connect between DA and DG/DB and DG) ... both ends
[Connection]
110Ω
110Ω
Terminal block: Off-the-shelf terminal block
Connector: Connector for the FA sensor
(ICE947-5-2) comparable product is recommended
CC-Link dedicated cable (uses 110 Ω terminal resistor)
Transmission Maximum length
rate of main line
625 kbps 100 m (328.1 ft.)
156 kbps 500 m (1640.5 ft.)
3: The cable length of 1m (3.28 ft.) or longer is for a system configured only with remote I/O stations and remote
device stations.
4: The cable length of 2m (6.56 ft.) or longer is for a system configuration that contains local stations and intelligent
device stations.
Maximum length of main line (not including the branch line length)
2 2
Master station
2
R
L/I
R
R
156 kbps
500 m
(1640.5 pt.)
200 m (656.2 pt.)
DA
DB
DG
SLD
FG
Length of cable between the
Distance
remote I/O stations or remote
between T
branches device stations
No limit 30 cm (11.8 in.) or longer
Distance between T branches
1 1
R R R
2
L/I
(Length of branch line: 8m (26.25 ft.) or shorter)
R
Indicates a remote I/O station or a remote device station.
L/I Indicates a local station or an intelligent device station.
MELSEC-Q
Remarks
10 M/5 M/2.5 Mbps are not allowed.
Indicates the length of the cable between terminal
resistors. The length of the T branch cable (branch line
length) is not included.
Indicates the overall cable length per branch.
Indicates the overall length of the entire branch cable.
The total number of connected stations depends on the
CC-Link specifications.
The CC-Link dedicated high performance cable
cannot be used (example: FANC-SBH).
Cables of different manufacturers cannot be used
together. (See the cable catalog for details on the
manufacturers.)
Use a commercially available terminal resistor of
110 Ω ± 5% and 1/2 W resistance.
110 Ω and 130 Ω resistors that are supplied with the
master/local modules cannot be used.
When wiring cables for the main line side, try not to
remove the covering as much as possible.
Length of cable between the
master/local station or
intelligent device station and
1
the adjacent station(s)
1 m (3.28 ft.) or longer (
2 m (6.56 ft.) or longer (
2 2
L/I L/I
2
R
2
1 1 1
R R R
2
3
)/
4
)
Terminal
resistor
1
R R
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